Global Patent Index - EP 1238182 A1

EP 1238182 A1 2002-09-11 - FLOW ACTUATED SHUT-OFF VALVE

Title (en)

FLOW ACTUATED SHUT-OFF VALVE

Title (de)

VOLUMENSTROM-BETÄTIGTES VENTIL

Title (fr)

FERMETURE DE SOUPAPE ACTIONNEE PAR LE DEBIT

Publication

EP 1238182 A1 (EN)

Application

EP 00966333 A

Priority

  • GB 0003927 W
  • US 45968499 A

Abstract (en)

[origin: WO0144617A1] The present invention generally provides a system and method for selectively sealing a drill string (14) or other tubular member. In one aspect, a sealing member, such as a valve (50), allows a certain level of flow of drilling fluids and/or other fluids through one or more flow channels (76) when the valve is open. To close the valve, the flow rate is increased so that a backpressure develops and urges the valve to a closed position. The valve can remain in position in the drill string and alternately open (right-hand half of the figure) and close (left-hand half of the figure) depending on the flow rate and/or the pressure drop through the valve. The valve also comprises a removable plug (90) disposed in the valve to provide access with, for example, wireline tools to a region below the valve in a wellbore.

IPC 1-7 (main, further and additional classification)

E21B 21/10

IPC 8 full level (invention and additional information)

E21B 21/10 (2006.01)

CPC (invention and additional information)

E21B 21/10 (2013.01); Y10T 137/7785 (2015.04)

Citation (search report)

See references of WO 0144617A1

Designated contracting state (EPC)

DE FR GB NL

DOCDB simple family

WO 0144617 A1 20010621; AU 7677200 A 20010625; CA 2394121 A1 20010621; CA 2394121 C 20071211; DE 60016970 D1 20050127; DE 60016970 T2 20051208; EP 1238182 A1 20020911; EP 1238182 B1 20041222; US 6349771 B1 20020226